Since I'm very interested in putting in a different N75 valve, I wanna know how it's possible that some people dont like it and some really like them.

I have a Octavia vRS from 2003 (AUQ engine), Open air intake, stock ECU.

Then there are 3 valves that would be interesting.

N75J, N75H and ECS race valve

After reading some forums (audi, vw, seat, ...) I found out that the N75H would be the most aggresive and best working on a stock 1.8T. Part number: 034 906 283 H

Any thoughts?

leave it alone the stock one is specific for your car !! stops you killing your turbo!!!

ecs one is just a n75 valve off a k04 turbo car all you will do is create a boost spike ( not good) !!!

LEAVE IT ALONE

LEAVE IT ALONE

LEAVE IT ALONE

That's advice No. 1

Don't get me wrong, I take your advice very serious.

But either you read to leave it alone, or you read that it's the best and cheapest mod ever.

yeah people that fit them usually havent a clue about what a n75 does and how it works and why its being used !!!!

i had a few cars fom standard power to high hp and not once was the n75 changed from standard

they think its amazing as you get a bit of a kick due to boost spike !!!!

Yep, leave it well alone as Clive said. The ECS 'race' and H valves just react differently to the normal F or E ones and give a big boost spike because the ECU isn't calibrated for them. Good way to put the car into limp mode.

i made this mistake with my audi a4... shall i show you what i eneded up doing?

True story..

is this a new engine?

iye.. over boosting wrecked alsorts! was easier to put a new lump in it! i love doing 1.8ts.. this was my first.. i have put a 1.8T in a mk2 golf and changed another in my A3 as it was fecked when i got it.

Well contrary to the posts on here I have a ECS N75 fitted but I must quote have modded engine( not turbo) and fitted with yellow DV spring also to dial out hesitation. I get no spike and a smooth aggresive pull from turbo through rev range.

The ECS is the N75J which ECS just refer to as the race valve which was fitted as std to various 20v turbos.

these are the various versions:

n75c, n75f, n75j, n75h

But agree with others you should not change the N75 though until you know what it is doing and the effect that it gives.

+1 ecs valve fitted no probs...

+1 ecs valve fitted no probs...

Have you ever logged what your cars doing?? Why did you fit it ???

If you want to spend $$$ on a renamed oem part lol then its your choice

Bowders did you fit after or before mapping??

Isn't swapping the N75 valve the same as modding your chip?

N75H should deliver +/- 1-3PSI over the rev range. Modding your chip does the same????

Or am I wrong in this?

REMINDER: My engine is still stock. I certainly can believe that it can cause problems with modded engines

fitted mine at christmas and the went back to aps to be remaped again,as i had a downpipe fitted and wanted to make sure every thing was running right.got mine from ebay(cheaper the oem part)

Edited 30 May, 201214 yr by MR G

If you have the car mapped with the new valve in mind, yes it can be a good idea. It's just when you use the wrong valve for your map that problems can occur. AFAIK, the OEM valves were designed because the turbo is a lot smaller and spools faster than the old Audi turbos so need a valve that reacts faster.

Have you ever logged what your cars doing?? Why did you fit it ???

If you want to spend $$$ on a renamed oem part lol then its your choice

Bowders did you fit after or before mapping??

After mapping and then had further mapping done. Car was hesitant before and after first mapping which is why I went for second mapping with ECS valve and a logging was done